Same as readMaybe, but takes Text as input instead of String.

>>> read "123" :: Maybe Int
Just 123

Maps given function over individual lines of the given text.

>>> mapLines ("T: " <>) "foo zz\nbar"
"T: foo zz\nT: bar"

Similar to unlines, but does not automatically adds n at the end of the text. Advantage is that when used together with toLines, it doesn't ocassionaly change the newlines ad the end of input text:

>>> fromLines . toLines $ "foo\nbar"
"foo\nbar"

>>> fromLines . toLines $ "foo\nbar\n"
"foo\nbar\n"

Other examples:

>>> fromLines []
""

>>> fromLines ["foo"]
"foo"

>>> fromLines ["first", "second"]
"first\nsecond"

>>> fromLines ["first", "second", ""]
"first\nsecond\n"

Similar to lines, but does not drop trailing newlines from output. Advantage is that when used together with fromLines, it doesn't ocassionaly change the newlines ad the end of input text:

>>> fromLines . toLines $ "foo\nbar"
"foo\nbar"

>>> fromLines . toLines $ "foo\nbar\n"
"foo\nbar\n"

Other examples:

>>> toLines ""
[]

>>> toLines "first\nsecond"
["first","second"]

>>> toLines "first\nsecond\n"
["first","second",""]